Aircraft Hydraulic Anti-skid Brake System Modeling And Fault Diagnosis Research

The anti-skid braking system of aircraft plays a vital role in safely takeoff and landing of aircraft. At present, with the more demand for function of the anti-skid braking system, the degree of complexity of the anti-skid braking system of aircraft is going to be higher, therefore, how to ensure devices working soundly and safely , which becomes a essential problem. So the math models of the anti-skid braking system are ameliorated, and fault diagnosis of the anti-skid braking system are maken scientific researches on.On the base of analysis about principle and function of the anti-skid braking system, the models of electrohydraulic valve and braking valve are set up , and novel model of tire is introduced, the math models of the system are ameliorated, such are groundwork on analysis of fault diagnosis and simulation; According to the ideas of model based fault diagnosis, the fault diagnosis system about electrohydraulic valve, braking valve and tire is builded , and the state observers of them is designed, then in the MATLAB with Simulink environment, the typical faults of the system are simulated in offline, Which provides a study method for fault diagnosis in line and analysis of reliability and safty; In accordance with fault diagnosis ideas of information, the expert system of the hydraulic anti-skid braking system of aircraft is taped, and the repositories, compositive data-base, dianoetic, interpreter and KA of the expert system are designed in details, then function of interaction between people and computer is introduced. It is practical significance for maintaining and cultivating worker on the ground.The study about simulation and fault diagnosis of the anti-skid braking system of aircraft, affords possibility of changing devices maintaining system and turning repair on time into repair on state, and is becoming the base on the fault control.